Complete the indicated task to unlock the corresponding character.
Character - How to unlock
Cleo - In 199X, catch up to her.
Dolphin Lundgren - In 9,600 BC, reach the waterfall with the falling logs. Ride the logs down instead of moving up, then jump to the bottom right corner of the area to find a door. Shoot it open and kill the enemy inside.
Jef Leppard - In 198X, search for his cage behind a large gate. An enemy robot will drop down. Quickly defeat the robot before it kills Jef to save him.
Lou Don Jim - In 3072, blow open the vent cover and enter the hallway. While avoiding the fires, look for a breakable floor. Destroy the panel, followed by a second panel to find Lou.
Melanie Gibson - In 199X, enter the pit at the base of the large tower in the far right of the area and kill the creatures before Melanie is lowered into them.
Merlin - In 673, reach the point where the path under a large spiked gates splits into an underground cavern then quickly go down and kill the executioner before he kills Merlin.
Squirty Harry - Collect 50% of the Glorbs.
Zackasaurus - In 1,000,000 BC, you will encounter Zack tagging dino eggs before reaching the Boss. Defeat the killer dinosaurs to save Zack.
Complete the following achievements to unlock Xbox Live Gamerscore points.
Achievement - How to unlock
1,000,000 BC Completed! (40 points) - Complete the Prehistoric time zone.
198X Completed! (40 points) - Complete the 198X time zone.
3 Birds 1 Stone (20 points) - Kill 3 enemies with a single Charged shot from Aimy McKillin.
9600 BC Completed! (40 points) - Complete the Ancient Atlantis time zone.
All of the Glorbs (75 points) - Collect all glorbs in the game.
Asplosion (20 points) - Use Jef's highly explosive rocket launcher to explode 15 enemies on a single level.
Baby's First Glorb (20 points) - Get your first Glorb Badge.
Defence is the New Offence (30 points) - Beat any level using only Shieldy Blockerson.
Gotta Save Them All! (50 points) - Complete any level without leaving any saveable team members behind.
Head Banger (20 points) - Kill any enemy by bouncing on it's head, plumber-style.
I Challenge You to a Duel (20 points) - Complete a Medieval level using only Lou Don Jim.
Impartiality (20 points) - Complete any level using at least 6 different members of the Super Time Force.
Infinity (75 points) - Defeat Dr. Infinity.
Number One Shard (20 points) - Get your first Shard badge.
OMG You Sharded! (75 points) - Shatter or collect all shards in the game.
Range of Fire (20 points) - Fire 7 different charged attacks in a single level.
Something Smells Rank (60 points) - Achieve your first STF rank on any level.
Speed Freak (50 points) - Complete any level with 30 seconds remaining on the clock.
Talent Scout (20 points) - Add a new team member to the Super Time Force.
Team Player (30 points) - Prevent the death of 50 members of the Super Time Force.
That Was Quick (20 points) - Die within 3 seconds of spawning.
The Runs (50 points) - Complete a... clean... run of any level using only Squirty Harry.
They Are Looking (35 points) - This ones totally a secret but you'll know it when you see it so hustle and look sharp.
Whole Lotta Lead (30 points) - Fire 5000 rounds with Jean Rambois' machine gun.
Year 199X Completed! (40 points) - Complete the Post-Apocalypse time zone.
Year 3072 Completed! (40 points) - Complete the Future City time zone.
Year 673 Completed! (40 points) - Complete the Medieval time zone.